Evening All, Got a Missfire on my TD6 . Had Injectors check by Bosch specialist 3 had bad leak back which i got reconditioned. Refitted today Still got Missfire, seems its no5 Listened with a piece of tube and was a Tinny like hollow noise ,worse with the Oil filler cap off. Any Ideas ????. Could it be Cracked Cylinder???. Any help grately appreciated.